If you are using SSH key-based authentication for local system users from this article here then avoid using the latest 14.1 firmware. https://docs.netscaler.com/en-us/citrix-adc/current-release/system/authentication-and-[…]tem-user/ssh-key-based-authentication-for-system-users.html Then SSH, Gui CLI, and sync will break. Already have a ticket open with support. If you did modify that file, it's master will also be in the /flash/nsconfig directory, and will overwrite the /etc version on reboots, so modify that one as well.